/* ------------------------------- style.js --------------------------------- */
VED.editor.implement({
   attachStyleStateChange: function( style, callback ) {
      // Try to get the list of attached callbacks.
      var styleStateChangeCallbacks = this._.styleStateChangeCallbacks;

      // If it doesn't exist, it means this is the first call. So, let's create
      // all the structure to manage the style checks and the callback calls.
      if ( !styleStateChangeCallbacks ) {
         // Create the callbacks array.
         styleStateChangeCallbacks = this._.styleStateChangeCallbacks = [];

         // Attach to the selectionChange event, so we can check the styles at
         // that point.
         this.on( 'selectionChange', function( ev ) {
            // Loop throw all registered callbacks.
            for ( var i = 0; i < styleStateChangeCallbacks.length; i++ ) {
               var callback = styleStateChangeCallbacks[ i ];

               // Check the current state for the style defined for that
               // callback.
               var currentState = callback.style.checkActive( ev.data.path ) ? VED.TRISTATE_ON : VED.TRISTATE_OFF;

               // Call the callback function, passing the current
               // state to it.
               callback.fn.call( this, currentState );
            }
         });
      }

      // Save the callback info, so it can be checked on the next occurrence of
      // selectionChange.
      styleStateChangeCallbacks.push( { style: style, fn: callback } );
   }
});

VED.STYLE_BLOCK = 1;
VED.STYLE_INLINE = 2;
VED.STYLE_OBJECT = 3;

(function() {
   var blockElements = { address:1,div:1,h1:1,h2:1,h3:1,h4:1,h5:1,h6:1,p:1,pre:1,section:1,header:1,footer:1,nav:1,article:1,aside:1,figure:1,dialog:1,hgroup:1,time:1,meter:1,menu:1,command:1,keygen:1,output:1,progress:1,details:1,datagrid:1,datalist:1 },
      objectElements = { a:1,embed:1,hr:1,img:1,li:1,object:1,ol:1,table:1,td:1,tr:1,th:1,ul:1,dl:1,dt:1,dd:1,form:1,audio:1,video:1 };

   var semicolonFixRegex = /\s*(?:;\s*|$)/,
      varRegex = /#\((.+?)\)/g;

   var notBookmark = VED.dom.walker.bookmark( 0, 1 ),
      nonWhitespaces = VED.dom.walker.whitespaces( 1 );

   VED.style = new Class({
      initialize: function( styleDefinition, variablesValues ) {

         // Inline style text as attribute should be converted
         // to styles object.
         var attrs = styleDefinition.attributes;
         if ( attrs && attrs.style ) {
            styleDefinition.styles = VED.tools.extend( {},
               styleDefinition.styles, VED.tools.parseCssText( attrs.style ) );
            delete attrs.style;
         }

         if ( variablesValues ) {
            styleDefinition = VED.tools.clone( styleDefinition );

            replaceVariables( styleDefinition.attributes, variablesValues );
            replaceVariables( styleDefinition.styles, variablesValues );
         }

         var element = this.element = styleDefinition.element ?
                                      (typeof styleDefinition.element == 'string' ?
                                       styleDefinition.element.toLowerCase() :
                                       styleDefinition.element ) : '*';

         this.type = styleDefinition.type ||
                     (blockElements[ element ] ? VED.STYLE_BLOCK :
                      objectElements[ element ] ? VED.STYLE_OBJECT :
                      VED.STYLE_INLINE );

         // If the 'element' property is an object with a set of possible element, it will be applied like an object style: only to existing elements
         if ( typeof this.element == 'object' )
            this.type = VED.STYLE_OBJECT;

         this._ = {
            definition: styleDefinition
         };
      }
   });

   VED.editor.implement({
      applyStyle: function( style ) {
         applyStyleOnSelection.call( style, this.getSelection() );
      },

      removeStyle: function( style ) {
         applyStyleOnSelection.call( style, this.getSelection(), 1 );
      }
   });

   VED.style.implement({

      apply: function( document ) {
         applyStyleOnSelection.call( this, document.getSelection() );
      },

      remove: function( document ) {
         applyStyleOnSelection.call( this, document.getSelection(), 1 );
      },

      applyToRange: function( range ) {
         return ( this.applyToRange =
                  this.type == VED.STYLE_INLINE ? applyInlineStyle :
                  this.type == VED.STYLE_BLOCK ? applyBlockStyle :
                  this.type == VED.STYLE_OBJECT ? applyObjectStyle :
                  null ).call( this, range );
      },

      removeFromRange: function( range ) {
         return ( this.removeFromRange =
                  this.type == VED.STYLE_INLINE ? removeInlineStyle :
                  this.type == VED.STYLE_BLOCK ? removeBlockStyle :
                  this.type == VED.STYLE_OBJECT ? removeObjectStyle :
                  null ).call( this, range );
      },

      applyToObject: function( element ) {
         setupElement( element, this );
      },

      checkActive: function( elementPath ) {
         switch ( this.type ) {
            case VED.STYLE_BLOCK:
               return this.checkElementRemovable( elementPath.block || elementPath.blockLimit, true );

            case VED.STYLE_OBJECT:
            case VED.STYLE_INLINE:

               var elements = elementPath.elements;

               for ( var i = 0, element; i < elements.length; i++ ) {
                  element = elements[ i ];

                  if ( this.type == VED.STYLE_INLINE && ( element == elementPath.block || element == elementPath.blockLimit ) )
                     continue;

                  if ( this.type == VED.STYLE_OBJECT ) {
                     var name = element.getName();
                     if ( !( typeof this.element == 'string' ? name == this.element : name in this.element ) )
                        continue;
                  }

                  if ( this.checkElementRemovable( element, true ) )
                     return true;
               }
         }
         return false;
      },

      checkApplicable: function( elementPath ) {
         switch ( this.type ) {
            case VED.STYLE_INLINE:
            case VED.STYLE_BLOCK:
               break;

            case VED.STYLE_OBJECT:
               return elementPath.contains( this.element );
         }

         return true;
      },

      checkElementMatch: function( element, fullMatch ) {
         var def = this._.definition;

         if ( !element || !def.ignoreReadonly && element.isReadOnly() )
            return false;

         var attribs,
            name = element.getName();

         // If the element name is the same as the style name.
         if ( typeof this.element == 'string' ? name == this.element : name in this.element ) {
            // If no attributes are defined in the element.
            if ( !fullMatch && !element.hasAttributes() )
               return true;

            attribs = getAttributesForComparison( def );

            if ( attribs._length ) {
               for ( var attName in attribs ) {
                  if ( attName == '_length' )
                     continue;

                  var elementAttr = element.getAttribute( attName ) || '';

                  // Special treatment for 'style' attribute is required.
                  if ( attName == 'style' ?
                       compareCssText( attribs[ attName ], elementAttr ) :
                       attribs[ attName ] == elementAttr )
                  {
                     if ( !fullMatch )
                        return true;
                  } else if ( fullMatch )
                     return false;
               }
               if ( fullMatch )
                  return true;
            } else
               return true;
         }

         return false;
      },

      checkElementRemovable: function( element, fullMatch ) {
         // Check element matches the style itself.
         if ( this.checkElementMatch( element, fullMatch ) )
            return true;

         // Check if the element matches the style overrides.
         var override = getOverrides( this )[ element.getName() ];
         if ( override ) {
            var attribs, attName;

            // If no attributes have been defined, remove the element.
            if ( !( attribs = override.attributes ) )
               return true;

            for ( var i = 0; i < attribs.length; i++ ) {
               attName = attribs[ i ][ 0 ];
               var actualAttrValue = element.getAttribute( attName );
               if ( actualAttrValue ) {
                  var attValue = attribs[ i ][ 1 ];

                  // Remove the attribute if:
                  //    - The override definition value is null;
                  //    - The override definition value is a string that
                  //      matches the attribute value exactly.
                  //    - The override definition value is a regex that
                  //      has matches in the attribute value.
                  if ( attValue === null ||
                       ( typeof attValue == 'string' &&
                         actualAttrValue == attValue ) ||
                       attValue.test( actualAttrValue ) )
                     return true;
               }
            }
         }
         return false;
      },

      buildPreview: function( label ) {
         var styleDefinition = this._.definition,
            html = [],
            elementName = styleDefinition.element;

         // Avoid <bdo> in the preview.
         if ( elementName == 'bdo' )
            elementName = 'span';

         html = [ '<', elementName ];

         // Assign all defined attributes.
         var attribs = styleDefinition.attributes;
         if ( attribs ) {
            for ( var att in attribs ) {
               html.push( ' ', att, '="', attribs[ att ], '"' );
            }
         }

         // Assign the style attribute.
         var cssStyle = VED.style.getStyleText( styleDefinition );
         if ( cssStyle )
            html.push( ' style="', cssStyle, '"' );

         html.push( '>', ( label || styleDefinition.name ), '</', elementName, '>' );

         return html.join( '' );
      },

      getDefinition: function() {
         return this._.definition;
      }
   });

   VED.style.getStyleText = function( styleDefinition ) {
      // If we have already computed it, just return it.
      var stylesDef = styleDefinition._ST;
      if ( stylesDef )
         return stylesDef;

      stylesDef = styleDefinition.styles;

      // Builds the StyleText.
      var stylesText = ( styleDefinition.attributes && styleDefinition.attributes[ 'style' ] ) || '',
         specialStylesText = '';

      if ( stylesText.length )
         stylesText = stylesText.replace( semicolonFixRegex, ';' );

      for ( var style in stylesDef ) {
         var styleVal = stylesDef[ style ],
            text = ( style + ':' + styleVal ).replace( semicolonFixRegex, ';' );

         // Some browsers don't support 'inherit' property value, leave them intact. (#5242)
         if ( styleVal == 'inherit' )
            specialStylesText += text;
         else
            stylesText += text;
      }

      // Browsers make some changes to the style when applying them. So, here
      // we normalize it to the browser format.
      if ( stylesText.length )
         stylesText = VED.tools.normalizeCssText( stylesText, true );

      stylesText += specialStylesText;

      // Return it, saving it to the next request.
      return ( styleDefinition._ST = stylesText );
   };

   // Gets the parent element which blocks the styling for an element. This
   // can be done through read-only elements (contenteditable=false) or
   // elements with the "data-nostyle" attribute.
   function getUnstylableParent( element, root ) {
      var unstylable, editable;

      while ( ( element = element.getParent() ) ) {
         if ( element.equals( root ) )
            break;

         if ( element.getAttribute( 'data-nostyle' ) )
            unstylable = element;
         else if ( !editable ) {
            var contentEditable = element.getAttribute( 'contentEditable' );

            if ( contentEditable == 'false' )
               unstylable = element;
            else if ( contentEditable == 'true' )
               editable = 1;
         }
      }

      return unstylable;
   }

   function applyInlineStyle( range ) {
      var document = range.document;

      if ( range.collapsed ) {
         // Create the element to be inserted in the DOM.
         var collapsedElement = getElement( this, document );

         // Insert the empty element into the DOM at the range position.
         range.insertNode( collapsedElement );

         // Place the selection right inside the empty element.
         range.moveToPosition( collapsedElement, VED.POSITION_BEFORE_END );

         return;
      }

      var elementName = this.element;
      var def = this._.definition;
      var isUnknownElement;

      // Indicates that fully selected read-only elements are to be included in the styling range.
      var ignoreReadonly = def.ignoreReadonly,
         includeReadonly = ignoreReadonly || def.includeReadonly;

      // If the read-only inclusion is not available in the definition, try
      // to get it from the root data (most often it's the editable).
      if ( includeReadonly == undefined )
         includeReadonly = range.root.getCustomData( 'ved_includeReadonly' );

      // Get the DTD definition for the element. Defaults to "span".
      var dtd = VED.dtd[ elementName ] || ( isUnknownElement = true, VED.dtd.span );

      // Expand the range.
      range.enlarge( VED.ENLARGE_INLINE, 1 );
      range.trim();

      // Get the first node to be processed and the last, which concludes the
      // processing.
      var boundaryNodes = range.createBookmark(),
         firstNode = boundaryNodes.startNode,
         lastNode = boundaryNodes.endNode;

      var currentNode = firstNode;

      var styleRange;

      if ( !ignoreReadonly ) {
         // Check if the boundaries are inside non stylable elements.
         var root = range.getCommonAncestor(),
            firstUnstylable = getUnstylableParent( firstNode, root ),
            lastUnstylable = getUnstylableParent( lastNode, root );

         // If the first element can't be styled, we'll start processing right
         // after its unstylable root.
         if ( firstUnstylable )
            currentNode = firstUnstylable.getNextSourceNode( true );

         // If the last element can't be styled, we'll stop processing on its
         // unstylable root.
         if ( lastUnstylable )
            lastNode = lastUnstylable;
      }

      // Do nothing if the current node now follows the last node to be processed.
      if ( currentNode.getPosition( lastNode ) == VED.POSITION_FOLLOWING )
         currentNode = 0;

      while ( currentNode ) {
         var applyStyle = false;

         if ( currentNode.equals( lastNode ) ) {
            currentNode = null;
            applyStyle = true;
         } else {
            var nodeType = currentNode.type;
            var nodeName = nodeType == VED.NODE_ELEMENT ? currentNode.getName() : null;
            var nodeIsReadonly = nodeName && ( currentNode.getAttribute( 'contentEditable' ) == 'false' );
            var nodeIsNoStyle = nodeName && currentNode.getAttribute( 'data-nostyle' );

            if ( nodeName && currentNode.data( 'ved-bookmark' ) ) {
               currentNode = currentNode.getNextSourceNode( true );
               continue;
            }

            // Check if the current node can be a child of the style element.
            if ( !nodeName ||
                 ( dtd[ nodeName ] && !nodeIsNoStyle &&
                   ( !nodeIsReadonly || includeReadonly ) &&
                   ( currentNode.getPosition( lastNode ) |
                     VED.POSITION_PRECEDING | VED.POSITION_IDENTICAL |
                     VED.POSITION_IS_CONTAINED ) ==
                   ( VED.POSITION_PRECEDING + VED.POSITION_IDENTICAL +
                     VED.POSITION_IS_CONTAINED ) &&
                   ( !def.childRule || def.childRule( currentNode ) ) ) ) {
               var currentParent = currentNode.getParent();

               // Check if the style element can be a child of the current
               // node parent or if the element is not defined in the DTD.
               if ( currentParent &&
                    ( ( currentParent.getDtd() ||
                        VED.dtd.span )[ elementName ] || isUnknownElement ) &&
                    ( !def.parentRule || def.parentRule( currentParent ) ) ) {
                  // This node will be part of our range, so if it has not
                  // been started, place its start right before the node.
                  // In the case of an element node, it will be included
                  // only if it is entirely inside the range.
                  if ( !styleRange &&
                       ( !nodeName || !VED.dtd.$removeEmpty[ nodeName ] ||
                         ( currentNode.getPosition( lastNode ) |
                           VED.POSITION_PRECEDING | VED.POSITION_IDENTICAL |
                           VED.POSITION_IS_CONTAINED ) ==
                         ( VED.POSITION_PRECEDING + VED.POSITION_IDENTICAL +
                           VED.POSITION_IS_CONTAINED ) ) ) {
                     styleRange = range.clone();
                     styleRange.setStartBefore( currentNode );
                  }

                  // Non element nodes, readonly elements, or empty
                  // elements can be added completely to the range.
                  if ( nodeType == VED.NODE_TEXT || nodeIsReadonly ||
                       ( nodeType == VED.NODE_ELEMENT &&
                         !currentNode.getChildCount() ) ) {
                     var includedNode = currentNode;
                     var parentNode;

                     // This node is about to be included completelly, but,
                     // if this is the last node in its parent, we must also
                     // check if the parent itself can be added completelly
                     // to the range, otherwise apply the style immediately.
                     while ( ( applyStyle = !includedNode.getNext( notBookmark ) ) &&
                             ( parentNode = includedNode.getParent(), dtd[ parentNode.getName() ] ) &&
                             ( parentNode.getPosition( firstNode ) |
                               VED.POSITION_FOLLOWING |
                               VED.POSITION_IDENTICAL |
                               VED.POSITION_IS_CONTAINED ) ==
                             ( VED.POSITION_FOLLOWING +
                               VED.POSITION_IDENTICAL +
                               VED.POSITION_IS_CONTAINED ) &&
                             ( !def.childRule || def.childRule( parentNode ) ) ) {
                        includedNode = parentNode;
                     }

                     styleRange.setEndAfter( includedNode );

                  }
               } else
                  applyStyle = true;
            } else
               applyStyle = true;

            // Get the next node to be processed.
            currentNode = currentNode.getNextSourceNode( nodeIsNoStyle || nodeIsReadonly && !includeReadonly );
         }

         // Apply the style if we have something to which apply it.
         if ( applyStyle && styleRange && !styleRange.collapsed ) {
            // Build the style element, based on the style object definition.
            var styleNode = getElement( this, document ),
               styleHasAttrs = styleNode.hasAttributes();

            // Get the element that holds the entire range.
            var parent = styleRange.getCommonAncestor();

            var removeList = {
               styles: {},
               attrs: {},
               // Styles cannot be removed.
               blockedStyles: {},
               // Attrs cannot be removed.
               blockedAttrs: {}
            };

            var attName, styleName, value;

            // Loop through the parents, removing the redundant attributes
            // from the element to be applied.
            while ( styleNode && parent ) {
               if ( parent.getName() == elementName ) {
                  for ( attName in def.attributes ) {
                     if ( removeList.blockedAttrs[ attName ] || !( value = parent.getAttribute( styleName ) ) )
                        continue;

                     if ( styleNode.getAttribute( attName ) == value )
                        removeList.attrs[ attName ] = 1;
                     else
                        removeList.blockedAttrs[ attName ] = 1;
                  }

                  for ( styleName in def.styles ) {
                     if ( removeList.blockedStyles[ styleName ] || !( value = parent.getStyle( styleName ) ) )
                        continue;

                     if ( styleNode.getStyle( styleName ) == value )
                        removeList.styles[ styleName ] = 1;
                     else
                        removeList.blockedStyles[ styleName ] = 1;
                  }
               }

               parent = parent.getParent();
            }

            for ( attName in removeList.attrs )
               styleNode.removeAttribute( attName );

            for ( styleName in removeList.styles )
               styleNode.removeStyle( styleName );

            if ( styleHasAttrs && !styleNode.hasAttributes() )
               styleNode = null;

            if ( styleNode ) {
               // Move the contents of the range to the style element.
               styleRange.extractContents().appendTo( styleNode );

               // Here we do some cleanup, removing all duplicated
               // elements from the style element.
               removeFromInsideElement.call( this, styleNode );

               // Insert it into the range position (it is collapsed after
               // extractContents.
               styleRange.insertNode( styleNode );

               // Let's merge our new style with its neighbors, if possible.
               styleNode.mergeSiblings();

               // As the style system breaks text nodes constantly, let's normalize
               // things for performance.
               // With IE, some paragraphs get broken when calling normalize()
               // repeatedly. Also, for IE, we must normalize body, not documentElement.
               // IE is also known for having a "crash effect" with normalize().
               // We should try to normalize with IE too in some way, somewhere.
               if ( !VED.env.ie )
                  styleNode.$.normalize();
            }
            // Style already inherit from parents, left just to clear up any internal overrides. (#5931)
            else {
               styleNode = new VED.dom.element( 'span' );
               styleRange.extractContents().appendTo( styleNode );
               styleRange.insertNode( styleNode );
               removeFromInsideElement.call( this, styleNode );
               styleNode.remove( true );
            }

            // Style applied, let's release the range, so it gets
            // re-initialization in the next loop.
            styleRange = null;
         }
      }

      // Remove the bookmark nodes.
      range.moveToBookmark( boundaryNodes );

      // Minimize the result range to exclude empty text nodes. (#5374)
      range.shrink( VED.SHRINK_TEXT );
   }

   function removeInlineStyle( range ) {
      // Make sure our range has included all "collpased" parent inline nodes so
      // that our operation logic can be simpler.
      range.enlarge( VED.ENLARGE_INLINE, 1 );

      var bookmark = range.createBookmark(),
         startNode = bookmark.startNode;

      if ( range.collapsed ) {
         var startPath = new VED.dom.elementPath( startNode.getParent(), range.root ),
            // The topmost element in elementspatch which we should jump out of.
            boundaryElement;


         for ( var i = 0, element; i < startPath.elements.length && ( element = startPath.elements[ i ] ); i++ ) {
            // 1. If it's collaped inside text nodes, try to remove the style from the whole element.
            //
            // 2. Otherwise if it's collapsed on element boundaries, moving the selection
            //  outside the styles instead of removing the whole tag,
            //  also make sure other inner styles were well preserverd.(#3309)
            if ( element == startPath.block || element == startPath.blockLimit )
               break;

            if ( this.checkElementRemovable( element ) ) {
               var isStart;

               if ( range.collapsed && ( range.checkBoundaryOfElement( element, VED.END ) || ( isStart = range.checkBoundaryOfElement( element, VED.START ) ) ) ) {
                  boundaryElement = element;
                  boundaryElement.match = isStart ? 'start' : 'end';
               } else {
                  /*
                   * Before removing the style node, there may be a sibling to the style node
                   * that's exactly the same to the one to be removed. To the user, it makes
                   * no difference that they're separate entities in the DOM tree. So, merge
                   * them before removal.
                   */
                  element.mergeSiblings();
                  if ( element.getName() == this.element )
                     removeFromElement.call( this, element );
                  else
                     removeOverrides( element, getOverrides( this )[ element.getName() ] );
               }
            }
         }

         // Re-create the style tree after/before the boundary element,
         // the replication start from bookmark start node to define the
         // new range.
         if ( boundaryElement ) {
            var clonedElement = startNode;
            for ( i = 0;; i++ ) {
               var newElement = startPath.elements[ i ];
               if ( newElement.equals( boundaryElement ) )
                  break;
               // Avoid copying any matched element.
               else if ( newElement.match )
                  continue;
               else
                  newElement = newElement.clone();
               newElement.append( clonedElement );
               clonedElement = newElement;
            }
            clonedElement[ boundaryElement.match == 'start' ? 'insertBefore' : 'insertAfter' ]( boundaryElement );
         }
      } else {
         // Now our range isn't collapsed. Lets walk from the start node to the end
         // node via DFS and remove the styles one-by-one.
         var endNode = bookmark.endNode,
            me = this;

         // Find out the style ancestor that needs to be broken down at startNode
         // and endNode.
         function breakNodes() {
            var startPath = new VED.dom.elementPath( startNode.getParent() ),
               endPath = new VED.dom.elementPath( endNode.getParent() ),
               breakStart = null,
               breakEnd = null;
            for ( var i = 0; i < startPath.elements.length; i++ ) {
               var element = startPath.elements[ i ];

               if ( element == startPath.block || element == startPath.blockLimit )
                  break;

               if ( me.checkElementRemovable( element ) )
                  breakStart = element;
            }
            for ( i = 0; i < endPath.elements.length; i++ ) {
               element = endPath.elements[ i ];

               if ( element == endPath.block || element == endPath.blockLimit )
                  break;

               if ( me.checkElementRemovable( element ) )
                  breakEnd = element;
            }

            if ( breakEnd )
               endNode.breakParent( breakEnd );
            if ( breakStart )
               startNode.breakParent( breakStart );
         }
         breakNodes();

         // Now, do the DFS walk.
         var currentNode = startNode;
         while ( !currentNode.equals( endNode ) ) {
            // Need to get the next node first because removeFromElement() can remove
            // the current node from DOM tree.
            var nextNode = currentNode.getNextSourceNode();
            if ( currentNode.type == VED.NODE_ELEMENT && this.checkElementRemovable( currentNode ) ) {
               // Remove style from element or overriding element.
               if ( currentNode.getName() == this.element )
                  removeFromElement.call( this, currentNode );
               else
                  removeOverrides( currentNode, getOverrides( this )[ currentNode.getName() ] );

               // removeFromElement() may have merged the next node with something before
               // the startNode via mergeSiblings(). In that case, the nextNode would
               // contain startNode and we'll have to call breakNodes() again and also
               // reassign the nextNode to something after startNode.
               if ( nextNode.type == VED.NODE_ELEMENT && nextNode.contains( startNode ) ) {
                  breakNodes();
                  nextNode = startNode.getNext();
               }
            }
            currentNode = nextNode;
         }
      }

      range.moveToBookmark( bookmark );
   }

   function applyObjectStyle( range ) {
      // Selected or parent element. (#9651)
      var start = range.getEnclosedNode() || range.getCommonAncestor( false, true ),
         element = new VED.dom.elementPath( start, range.root ).contains( this.element, 1 );

      element && !element.isReadOnly() && setupElement( element, this );
   }

   function removeObjectStyle( range ) {
      var parent = range.getCommonAncestor( true, true ),
         element = new VED.dom.elementPath( parent, range.root ).contains( this.element, 1 );

      if ( !element )
         return;

      var style = this,
         def = style._.definition,
         attributes = def.attributes;

      // Remove all defined attributes.
      if ( attributes ) {
         for ( var att in attributes ) {
            element.removeAttribute( att, attributes[ att ] );
         }
      }

      // Assign all defined styles.
      if ( def.styles ) {
         for ( var i in def.styles ) {
            if ( !def.styles.hasOwnProperty( i ) )
               continue;

            element.removeStyle( i );
         }
      }
   }

   function applyBlockStyle( range ) {
      // Serializible bookmarks is needed here since
      // elements may be merged.
      var bookmark = range.createBookmark( true );

      var iterator = range.createIterator();
      iterator.enforceRealBlocks = true;

      // make recognize <br /> tag as a separator in ENTER_BR mode (#5121)
      if ( this._.enterMode )
         iterator.enlargeBr = ( this._.enterMode != VED.ENTER_BR );

      var block;
      var doc = range.document;
      var previousPreBlock;

      while ( ( block = iterator.getNextParagraph() ) ) // Only one =
      {
         if ( !block.isReadOnly() ) {
            var newBlock = getElement( this, doc, block );
            replaceBlock( block, newBlock );
         }
      }

      range.moveToBookmark( bookmark );
   }

   function removeBlockStyle( range ) {
      // Serializible bookmarks is needed here since
      // elements may be merged.
      var bookmark = range.createBookmark( 1 );

      var iterator = range.createIterator();
      iterator.enforceRealBlocks = true;
      iterator.enlargeBr = this._.enterMode != VED.ENTER_BR;

      var block;
      while ( ( block = iterator.getNextParagraph() ) ) {
         if ( this.checkElementRemovable( block ) ) {
            // <pre> get special treatment.
            if ( block.is( 'pre' ) ) {
               var newBlock = this._.enterMode == VED.ENTER_BR ? null :
                              range.document.createElement( this._.enterMode == VED.ENTER_DIV ? 'div' : 'p' );

               newBlock && block.copyAttributes( newBlock );
               replaceBlock( block, newBlock );
            } else
               removeFromElement.call( this, block );
         }
      }

      range.moveToBookmark( bookmark );
   }

   // Replace the original block with new one, with special treatment
   // for <pre> blocks to make sure content format is well preserved, and merging/splitting adjacent
   // when necessary. (#3188)
   function replaceBlock( block, newBlock ) {
      // Block is to be removed, create a temp element to
      // save contents.
      var removeBlock = !newBlock;
      if ( removeBlock ) {
         newBlock = block.getDocument().createElement( 'div' );
         block.copyAttributes( newBlock );
      }

      var newBlockIsPre = newBlock && newBlock.is( 'pre' );
      var blockIsPre = block.is( 'pre' );

      var isToPre = newBlockIsPre && !blockIsPre;
      var isFromPre = !newBlockIsPre && blockIsPre;

      if ( isToPre )
         newBlock = toPre( block, newBlock );
      else if ( isFromPre )
         // Split big <pre> into pieces before start to convert.
         newBlock = fromPres( removeBlock ? [ block.getHtml() ] : splitIntoPres( block ), newBlock );
      else
         block.moveChildren( newBlock );

      newBlock.replace( block );

      if ( newBlockIsPre ) {
         // Merge previous <pre> blocks.
         mergePre( newBlock );
      } else if ( removeBlock )
         removeNoAttribsElement( newBlock );
   }

   // Merge a <pre> block with a previous sibling if available.
   function mergePre( preBlock ) {
      var previousBlock;
      if ( !( ( previousBlock = preBlock.getPrevious( nonWhitespaces ) ) && previousBlock.is && previousBlock.is( 'pre' ) ) )
         return;

      // Merge the previous <pre> block contents into the current <pre>
      // block.
      //
      // Another thing to be careful here is that currentBlock might contain
      // a '\n' at the beginning, and previousBlock might contain a '\n'
      // towards the end. These new lines are not normally displayed but they
      // become visible after merging.
      var mergedHtml = replace( previousBlock.getHtml(), /\n$/, '' ) + '\n\n' +
         replace( preBlock.getHtml(), /^\n/, '' );

      // Krugle: IE normalizes innerHTML from <pre>, breaking whitespaces.
      if ( VED.env.ie )
         preBlock.$.outerHTML = '<pre>' + mergedHtml + '</pre>';
      else
         preBlock.setHtml( mergedHtml );

      previousBlock.remove();
   }

   // Split into multiple <pre> blocks separated by double line-break.
   function splitIntoPres( preBlock ) {
      // Exclude the ones at header OR at tail,
      // and ignore bookmark content between them.
      var duoBrRegex = /(\S\s*)\n(?:\s|(<span[^>]+data-ved-bookmark.*?\/span>))*\n(?!$)/gi,
         blockName = preBlock.getName(),
         splitedHtml = replace( preBlock.getOuterHtml(), duoBrRegex, function( match, charBefore, bookmark ) {
            return charBefore + '</pre>' + bookmark + '<pre>';
         });

      var pres = [];
      splitedHtml.replace( /<pre\b.*?>([\s\S]*?)<\/pre>/gi, function( match, preContent ) {
         pres.push( preContent );
      });
      return pres;
   }

   // Wrapper function of String::replace without considering of head/tail bookmarks nodes.
   function replace( str, regexp, replacement ) {
      var headBookmark = '',
         tailBookmark = '';

      str = str.replace( /(^<span[^>]+data-ved-bookmark.*?\/span>)|(<span[^>]+data-ved-bookmark.*?\/span>$)/gi, function( str, m1, m2 ) {
         m1 && ( headBookmark = m1 );
         m2 && ( tailBookmark = m2 );
         return '';
      });
      return headBookmark + str.replace( regexp, replacement ) + tailBookmark;
   }

   // Converting a list of <pre> into blocks with format well preserved.
   function fromPres( preHtmls, newBlock ) {
      var docFrag;
      if ( preHtmls.length > 1 )
         docFrag = new VED.dom.documentFragment( newBlock.getDocument() );

      for ( var i = 0; i < preHtmls.length; i++ ) {
         var blockHtml = preHtmls[ i ];

         // 1. Trim the first and last line-breaks immediately after and before <pre>,
         // they're not visible.
         blockHtml = blockHtml.replace( /(\r\n|\r)/g, '\n' );
         blockHtml = replace( blockHtml, /^[ \t]*\n/, '' );
         blockHtml = replace( blockHtml, /\n$/, '' );
         // 2. Convert spaces or tabs at the beginning or at the end to &nbsp;
         blockHtml = replace( blockHtml, /^[ \t]+|[ \t]+$/g, function( match, offset, s ) {
            if ( match.length == 1 ) // one space, preserve it
            return '&nbsp;';
            else if ( !offset ) // beginning of block
            return VED.tools.repeat( '&nbsp;', match.length - 1 ) + ' ';
            else // end of block
            return ' ' + VED.tools.repeat( '&nbsp;', match.length - 1 );
         });

         // 3. Convert \n to <BR>.
         // 4. Convert contiguous (i.e. non-singular) spaces or tabs to &nbsp;
         blockHtml = blockHtml.replace( /\n/g, '<br>' );
         blockHtml = blockHtml.replace( /[ \t]{2,}/g, function( match ) {
            return VED.tools.repeat( '&nbsp;', match.length - 1 ) + ' ';
         });

         if ( docFrag ) {
            var newBlockClone = newBlock.clone();
            newBlockClone.setHtml( blockHtml );
            docFrag.append( newBlockClone );
         } else
            newBlock.setHtml( blockHtml );
      }

      return docFrag || newBlock;
   }

   // Converting from a non-PRE block to a PRE block in formatting operations.
   function toPre( block, newBlock ) {
      var bogus = block.getBogus();
      bogus && bogus.remove();

      // First trim the block content.
      var preHtml = block.getHtml();

      // 1. Trim head/tail spaces, they're not visible.
      preHtml = replace( preHtml, /(?:^[ \t\n\r]+)|(?:[ \t\n\r]+$)/g, '' );
      // 2. Delete ANSI whitespaces immediately before and after <BR> because
      //    they are not visible.
      preHtml = preHtml.replace( /[ \t\r\n]*(<br[^>]*>)[ \t\r\n]*/gi, '$1' );
      // 3. Compress other ANSI whitespaces since they're only visible as one
      //    single space previously.
      // 4. Convert &nbsp; to spaces since &nbsp; is no longer needed in <PRE>.
      preHtml = preHtml.replace( /([ \t\n\r]+|&nbsp;)/g, ' ' );
      // 5. Convert any <BR /> to \n. This must not be done earlier because
      //    the \n would then get compressed.
      preHtml = preHtml.replace( /<br\b[^>]*>/gi, '\n' );

      // Krugle: IE normalizes innerHTML to <pre>, breaking whitespaces.
      if ( VED.env.ie ) {
         var temp = block.getDocument().createElement( 'div' );
         temp.append( newBlock );
         newBlock.$.outerHTML = '<pre>' + preHtml + '</pre>';
         newBlock.copyAttributes( temp.getFirst() );
         newBlock = temp.getFirst().remove();
      } else
         newBlock.setHtml( preHtml );

      return newBlock;
   }

   // Removes a style from an element itself, don't care about its subtree.
   function removeFromElement( element ) {
      var def = this._.definition,
         attributes = def.attributes,
         styles = def.styles,
         overrides = getOverrides( this )[ element.getName() ],
         // If the style is only about the element itself, we have to remove the element.
         removeEmpty = VED.tools.isEmpty( attributes ) && VED.tools.isEmpty( styles );

      // Remove definition attributes/style from the elemnt.
      for ( var attName in attributes ) {
         // The 'class' element value must match (#1318).
         if ( ( attName == 'class' || this._.definition.fullMatch ) && element.getAttribute( attName ) != normalizeProperty( attName, attributes[ attName ] ) )
            continue;
         removeEmpty = element.hasAttribute( attName );
         element.removeAttribute( attName );
      }

      for ( var styleName in styles ) {
         // Full match style insist on having fully equivalence. (#5018)
         if ( this._.definition.fullMatch && element.getStyle( styleName ) != normalizeProperty( styleName, styles[ styleName ], true ) )
            continue;

         removeEmpty = removeEmpty || !!element.getStyle( styleName );
         element.removeStyle( styleName );
      }

      // Remove overrides, but don't remove the element if it's a block element
      removeOverrides( element, overrides, blockElements[ element.getName() ] );

      if ( removeEmpty ) {
         if ( this._.definition.alwaysRemoveElement )
            removeNoAttribsElement( element, 1 );
         else {
            !VED.dtd.$block[ element.getName() ] || this._.enterMode == VED.ENTER_BR && !element.hasAttributes() ? removeNoAttribsElement( element ) : element.renameNode( this._.enterMode == VED.ENTER_DIV ? 'div' : 'p' );
         }
      }
   }

   // Removes a style from inside an element.
   function removeFromInsideElement( element ) {
      var def = this._.definition,
         attribs = def.attributes,
         styles = def.styles,
         overrides = getOverrides( this ),
         innerElements = element.getElementsByTag( this.element );

      for ( var i = innerElements.count(); --i >= 0; )
         removeFromElement.call( this, innerElements.getItem( i ) );

      // Now remove any other element with different name that is
      // defined to be overriden.
      for ( var overrideElement in overrides ) {
         if ( overrideElement != this.element ) {
            innerElements = element.getElementsByTag( overrideElement );
            for ( i = innerElements.count() - 1; i >= 0; i-- ) {
               var innerElement = innerElements.getItem( i );
               removeOverrides( innerElement, overrides[ overrideElement ] );
            }
         }
      }
   }

   // Remove overriding styles/attributes from the specific element.
   // Note: Remove the element if no attributes remain.
   // @param {Object} element
   // @param {Object} overrides
   // @param {Boolean} Don't remove the element
   function removeOverrides( element, overrides, dontRemove ) {
      var attributes = overrides && overrides.attributes;

      if ( attributes ) {
         for ( var i = 0; i < attributes.length; i++ ) {
            var attName = attributes[ i ][ 0 ],
               actualAttrValue;

            if ( ( actualAttrValue = element.getAttribute( attName ) ) ) {
               var attValue = attributes[ i ][ 1 ];

               // Remove the attribute if:
               //    - The override definition value is null ;
               //    - The override definition valie is a string that
               //      matches the attribute value exactly.
               //    - The override definition value is a regex that
               //      has matches in the attribute value.
               if ( attValue === null || ( attValue.test && attValue.test( actualAttrValue ) ) || ( typeof attValue == 'string' && actualAttrValue == attValue ) )
                  element.removeAttribute( attName );
            }
         }
      }

      if ( !dontRemove )
         removeNoAttribsElement( element );
   }

   // If the element has no more attributes, remove it.
   function removeNoAttribsElement( element, forceRemove ) {
      // If no more attributes remained in the element, remove it,
      // leaving its children.
      if ( !element.hasAttributes() || forceRemove ) {
         if ( VED.dtd.$block[ element.getName() ] ) {
            var previous = element.getPrevious( nonWhitespaces ),
               next = element.getNext( nonWhitespaces );

            if ( previous && ( previous.type == VED.NODE_TEXT || !previous.isBlockBoundary( { br:1 } ) ) )
               element.append( 'br', 1 );
            if ( next && ( next.type == VED.NODE_TEXT || !next.isBlockBoundary( { br:1 } ) ) )
               element.append( 'br' );

            element.remove( true );
         } else {
            // Removing elements may open points where merging is possible,
            // so let's cache the first and last nodes for later checking.
            var firstChild = element.getFirst();
            var lastChild = element.getLast();

            element.remove( true );

            if ( firstChild ) {
               // Check the cached nodes for merging.
               firstChild.type == VED.NODE_ELEMENT && firstChild.mergeSiblings();

               if ( lastChild && !firstChild.equals( lastChild ) && lastChild.type == VED.NODE_ELEMENT )
                  lastChild.mergeSiblings();
            }

         }
      }
   }

   function getElement( style, targetDocument, element ) {
      var el,
         def = style._.definition,
         elementName = style.element;

      // The "*" element name will always be a span for this function.
      if ( elementName == '*' )
         elementName = 'span';

      // Create the element.
      el = new VED.dom.element( elementName, targetDocument );

      // #6226: attributes should be copied before the new ones are applied
      if ( element )
         element.copyAttributes( el );

      el = setupElement( el, style );

      // Avoid ID duplication.
      if ( targetDocument.getCustomData( 'doc_processing_style' ) && el.hasAttribute( 'id' ) )
         el.removeAttribute( 'id' );
      else
         targetDocument.setCustomData( 'doc_processing_style', 1 );

      return el;
   }

   function setupElement( el, style ) {
      var def = style._.definition,
         attributes = def.attributes,
         styles = VED.style.getStyleText( def );

      // Assign all defined attributes.
      if ( attributes ) {
         for ( var att in attributes ) {
            el.setAttribute( att, attributes[ att ] );
         }
      }

      // Assign all defined styles.
      if ( styles )
         el.setAttribute( 'style', styles );

      return el;
   }

   function replaceVariables( list, variablesValues ) {
      for ( var item in list ) {
         list[ item ] = list[ item ].replace( varRegex, function( match, varName ) {
            return variablesValues[ varName ];
         });
      }
   }

   // Returns an object that can be used for style matching comparison.
   // Attributes names and values are all lowercased, and the styles get
   // merged with the style attribute.
   function getAttributesForComparison( styleDefinition ) {
      // If we have already computed it, just return it.
      var attribs = styleDefinition._AC;
      if ( attribs )
         return attribs;

      attribs = {};

      var length = 0;

      // Loop through all defined attributes.
      var styleAttribs = styleDefinition.attributes;
      if ( styleAttribs ) {
         for ( var styleAtt in styleAttribs ) {
            length++;
            attribs[ styleAtt ] = styleAttribs[ styleAtt ];
         }
      }

      // Includes the style definitions.
      var styleText = VED.style.getStyleText( styleDefinition );
      if ( styleText ) {
         if ( !attribs[ 'style' ] )
            length++;
         attribs[ 'style' ] = styleText;
      }

      // Appends the "length" information to the object.
      attribs._length = length;

      // Return it, saving it to the next request.
      return ( styleDefinition._AC = attribs );
   }

   // Get the the collection used to compare the elements and attributes,
   // defined in this style overrides, with other element. All information in
   // it is lowercased.
   // @param {VED.style} style
   function getOverrides( style ) {
      if ( style._.overrides )
         return style._.overrides;

      var overrides = ( style._.overrides = {} ),
         definition = style._.definition.overrides;

      if ( definition ) {
         // The override description can be a string, object or array.
         // Internally, well handle arrays only, so transform it if needed.
         if ( !VED.tools.isArray( definition ) )
            definition = [ definition ];

         // Loop through all override definitions.
         for ( var i = 0; i < definition.length; i++ ) {
            var override = definition[ i ];
            var elementName;
            var overrideEl;
            var attrs;

            // If can be a string with the element name.
            if ( typeof override == 'string' )
               elementName = override.toLowerCase();
            // Or an object.
            else {
               elementName = override.element ? override.element.toLowerCase() : style.element;
               attrs = override.attributes;
            }

            // We can have more than one override definition for the same
            // element name, so we attempt to simply append information to
            // it if it already exists.
            overrideEl = overrides[ elementName ] || ( overrides[ elementName ] = {} );

            if ( attrs ) {
               // The returning attributes list is an array, because we
               // could have different override definitions for the same
               // attribute name.
               var overrideAttrs = ( overrideEl.attributes = overrideEl.attributes || new Array() );
               for ( var attName in attrs ) {
                  // Each item in the attributes array is also an array,
                  // where [0] is the attribute name and [1] is the
                  // override value.
                  overrideAttrs.push( [ attName.toLowerCase(), attrs[ attName ] ] );
               }
            }
         }
      }

      return overrides;
   }

   // Make the comparison of attribute value easier by standardizing it.
   function normalizeProperty( name, value, isStyle ) {
      var temp = new VED.dom.element( 'span' );
      temp[ isStyle ? 'setStyle' : 'setAttribute' ]( name, value );
      return temp[ isStyle ? 'getStyle' : 'getAttribute' ]( name );
   }

   // Compare two bunch of styles, with the speciality that value 'inherit'
   // is treated as a wildcard which will match any value.
   // @param {Object/String} source
   // @param {Object/String} target
   function compareCssText( source, target ) {
      typeof source == 'string' && ( source = VED.tools.parseCssText( source ) );
      typeof target == 'string' && ( target = VED.tools.parseCssText( target, true ) );
      for ( var name in source ) {
         if ( !( name in target && ( target[ name ] == source[ name ] || source[ name ] == 'inherit' || target[ name ] == 'inherit' ) ) ) {
            return false;
         }
      }
      return true;
   }

   function applyStyleOnSelection( selection, remove ) {
      var doc = selection.document,
         ranges = selection.getRanges(),
         func = remove ? this.removeFromRange : this.applyToRange,
         range;

      var iterator = ranges.createIterator();
      while ( ( range = iterator.getNextRange() ) )
         func.call( this, range );

      selection.selectRanges( ranges );
      doc.removeCustomData( 'doc_processing_style' );
   }
})();


VED.styleCommand = new Class({
   initialize: function( style, ext ) {
      this.style = style;
      this.allowedContent = style;
      this.requiredContent = style;

      VED.tools.extend( this, ext, true );
   },

   exec: function( editor ) {
      editor.focus();

      if ( this.state == VED.TRISTATE_OFF )
         editor.applyStyle( this.style );
      else if ( this.state == VED.TRISTATE_ON )
         editor.removeStyle( this.style );
   }
});

VED.stylesSet = new VED.resourceManager( '', 'stylesSet' );

// Backward compatibility (#5025).
VED.addStylesSet = VED.tools.bind( VED.stylesSet.add, VED.stylesSet );
VED.loadStylesSet = function( name, url, callback ) {
   VED.stylesSet.addExternal( name, url, '' );
   VED.stylesSet.load( name, callback );
};

VED.editor.implement({
   getStylesSet: function( callback ) {
      if ( !this._.stylesDefinitions ) {
         var editor = this,
            // Respect the backwards compatible definition entry
            configStyleSet = editor.config.stylesCombo_stylesSet || editor.config.stylesSet;

         // The false value means that none styles should be loaded.
         if ( configStyleSet === false ) {
            callback( null );
            return;
         }

         // #5352 Allow to define the styles directly in the config object
         if ( configStyleSet instanceof Array ) {
            editor._.stylesDefinitions = configStyleSet;
            callback( configStyleSet );
            return;
         }

         // Default value is 'default'.
         if ( !configStyleSet )
            configStyleSet = 'default';

         var partsStylesSet = configStyleSet.split( ':' ),
            styleSetName = partsStylesSet[ 0 ],
            externalPath = partsStylesSet[ 1 ];

         VED.stylesSet.addExternal( styleSetName, externalPath ? partsStylesSet.slice( 1 ).join( ':' ) : VED.getUrl( 'styles.js' ), '' );

         VED.stylesSet.load( styleSetName, function( stylesSet ) {
            editor._.stylesDefinitions = stylesSet[ styleSetName ];
            callback( editor._.stylesDefinitions );
         });
      } else
         callback( this._.stylesDefinitions );
   }
});





